{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.667","julian_year":2026.667,"time":"2026-09-01T15:14:02.913Z","years_from_j2000":26.667,"frame":"date","applied":"Proper motion, then precession and nutation. The catalogued J2000 position is carried along the great circle the object's own published motion puts it on, at a constant velocity, and the result is referred to the true equator and equinox of this instant. Those are separate things: the motion moves the object, and the rotation turns the grid under it by about fifty arcseconds a year, with nutation adding up to another seventeen.","excluded":"Parallax, the radial-velocity perspective term, aberration and refraction; each is below the accuracy of the catalogued positions themselves. An object with no published proper motion comes back where the catalogue has it rather than at a fabricated zero, and says so with a null pm_ra_mas_yr. A body with no fixed position is not propagated at all — its place comes from an ephemeris, which is what /api/v1/visible answers with."},"slug":"ngc-7166","name":"NGC 7166","class":"elliptical_galaxy_e_s0","category":"galaxy","object_type":"Elliptical galaxy E-S0","mag":12.04,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":103217028.50445147,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":330.13716666666664,"dec_deg":-43.38972222222222,"epoch_ra_deg":330.5528,"epoch_dec_deg":-43.260981,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Grus","discovered":"1834","featured":false,"url":"https://spacecatalog.org/object/ngc-7166","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":13.03,"h_mag":8.72,"j_mag":9.47,"k_mag":8.52,"v_mag":12.04,"redshift":0.008099,"hubble_type":"E-S0","wikidata_id":"Q1149953","redshift_cmb":0.007348176634394132,"discovered_by":"John Frederick William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[14658483.676166147,14658483.676166147]},"major_axis_arcmin":0.81,"minor_axis_arcmin":0.52,"position_angle_deg":10,"surface_brightness":21.3,"radial_velocity_km_s":2418},"designations":[{"catalog":"2MASX","designation":"2MASX J22003292-4323232"},{"catalog":"ESO","designation":"ESO 288-027"},{"catalog":"ESO","designation":"ESO 288-27"},{"catalog":"ESO-LV","designation":"ESO-LV 288-0270"},{"catalog":"LEDA","designation":"LEDA 67817"},{"catalog":"MCG","designation":"MCG -07-45-004"},{"catalog":"NGC","designation":"NGC 7166"},{"catalog":"PGC","designation":"PGC 67817"}],"source":{"id":"openngc","name":"OpenNGC","url":"https://github.com/mattiaverga/OpenNGC","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-30T09:56:50.739Z","attribution":"Data from SpaceCatalog.org. Individual records carry their source and license in `source`; attribution is required for CC-BY and CC-BY-SA rows."}